Rear Drive Axle

DTC C0574

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0574 02
- Printed Circuit Board Temperature Sensor Short to Ground

DTC C0574 04
- Printed Circuit Board Temperature Sensor Open

DTC C0574 13
- Printed Circuit Board Temperature Sensor Low Voltage/High Temperature

DTC C0574 14
- Printed Circuit Board Temperature Sensor High Voltage/Low Temperature

Circuit/System Description

A temperature sensor is installed on the circuit board of the Rear Differential Clutch Control Module. The sensor is used for calculating the module circuit board and differential clutch fluid temperature.

Conditions for Running the DTC

* The ignition is ON.

* The test runs with a frequency of 50 Hz.

Conditions for Setting the DTC

C0574 02

The analog-digital converter circuit is shorted to ground for more than 3 seconds.

C0574 04

The analog-digital converter circuit is open for more than 3 seconds.

C0574 13

The board temperature is greater than 115°C (239°F) for more than 3 seconds.

C0574 14

The board temperature is less than -40°C (-40°F) for more than 3 seconds.

Action Taken When the DTC Sets

One or more of the following actions may occur:

* All-wheel drive (AWD) is disabled.

* Service Rear Axle is displayed on the driver information center.

Conditions for Clearing the DTC

C0574 02 and C0574 04

* The condition for setting the DTC is no longer present.

* The circuit is not tested unless the ignition is cycled.

C0574 13 and C0574 14

* The temperature is within the limit for more than 30 s.

* The circuit is tested with a frequency of 50 Hz.

Diagnostic Aids

C0574 13 and C0574 14

The DTCs C0574 13 and C0574 14 indicate that the Rear Differential Clutch Control Module temperature is out of range. This is a temporary fault. The Rear Differential Clutch Control Module is protected against running during critical temperatures. As soon as the temperature reaches normal values the actual DTC is cleared.

Reference Information

Schematic Reference

Rear Axle Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Rear Drive Axle Description and Operation Description

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify the scan tool Rear Differential Clutch Control Module Temperature parameter is between -40°C (-40°F) and 115°C (239°F).

• If not between -40°C (-40°F) and 115°C (239°F)
Refer to Circuit/System Testing.

• If between -40°C (-40°F) and 115°C (239°F)

3. All OK.

Circuit/System Testing

Note: The Q48 Rear Drive Clutch Solenoid Valve is calibrated with and is part of the K47 Rear Differential Clutch Control Module. Both components must be replaced as a matched set.

C0574 02 and 0574 04

1. Ignition ON.

2. Verify DTC C0574 02 or 0574 04 is not set.

• If either DTC is set
Replace the K47 Rear Differential Clutch Control Module.

• If the DTC is not set

3. All OK.

C0574 13 and 0574 14

1. Ignition OFF, allow the housing and the K47 Rear Differential Clutch Control Module temperature to adjust to within 0-40°C (32-104°F).

2. Ignition ON.

3. Verify DTC C0574 13 or C0574 14 is not set.

• If either DTC is set
Replace the K47 Rear Differential Clutch Control Module.

• If the DTC is not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module References for Rear Differential Clutch Control Module replacement, programming, and setup.